Follow imports when going to definitions

This fixes microsoft#1033 following the change of behaviour in jedi's
`goto_assignments` in the upgrade from 0.9.0 to 0.11.1. The
change is assumed to be a bug-fix since it now appears to obey
the `follow_imports` boolean for cases which it previously
would follow imports even when the value was set to `False`.

Since we actually do want to follow imports here, we set the
value to `True` to restore the old behaviour.

pythonFiles/completion.py

@@ -570,7 +570,7 @@ def _process_request(self, request):
         if lookup == 'definitions':
             defs = []
             try:
-                defs = self._get_definitionsx(script.goto_assignments(follow_imports=False), request['id'])
+                defs = self._get_definitionsx(script.goto_assignments(follow_imports=True), request['id'])
             except:
                 pass
             try: